This question is an extension for my previously asked question here: Why is the voltage across collector and emitter pushing itself to 0.7 volts?
A colleague of mine suggested that I take a look at the stability factor for the circuit in that question. I calculated it and found it to be 284, which is very high and bad, and I thought that this is what was driving the transistor into saturation. But then re-did my calculations by assuming a lower stability factor of 10. From this, I got new values of resistors as follows:
R1 = 4.7 K ohms
R2 = 1.2 K ohms
Rc = 2.2 K ohms
Re = 100 ohms
After making these changes, when I tested the DC conditions by applying a supply voltage of 5 volts, there were no changes in the results. The Vce voltage still remains at 0.7 volts, i.e almost in saturation, contrast to my expected value of 2.5 volts. Here are the various voltage drops I get:
Across R1 : 4.6 volts
Across R2: 0.4 volts
Across Rc: 4.2 volts
Across Re: 0.2 volts
I have even tried changing the transistor. The transistor I used is 2N3904C NPN. Please enlighten me and provide me with a solution on how to overcome this.